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This section describes the terminal flags and fields that control how
output characters are translated and padded for display. All of these
are contained in the c_oflag member of the struct termios
structure.
The c_oflag member itself is an integer, and you change the flags
and fields using the operators &, |, and ^. Don't
try to specify the entire value for c_oflag---instead, change
only specific flags and leave the rest untouched (see section Setting Terminal Modes Properly).
If this bit is set, output data is processed in some unspecified way so
that it is displayed appropriately on the terminal device. This
typically includes mapping newline characters ('\n') onto
carriage return and linefeed pairs.
If this bit isn't set, the characters are transmitted as-is.
The following three bits are BSD features, and they have no effect on
non-BSD systems. On all systems, they are effective only if
OPOST is set.
If this bit is set, convert the newline character on output into a pair of characters, carriage return followed by linefeed.
If this bit is set, convert tab characters on output into the appropriate number of spaces to emulate a tab stop every eight columns.
If this bit is set, discard C-d characters (code 004) on
output. These characters cause many dial-up terminals to disconnect.
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